NXP MPC8378E Reference guide

Brand: NXP

Model: MPC8378E

Type: Reference guide

This manual is also suitable for

Freescale Semiconductor

Addendum

ved.

This errata describes corrections to the MPC8379E PowerQUICC II Pro Integrated Host Processor

Family Reference Manual, Revision 1. For convenience, the section number and page number of the errata

item in the reference manual are provided. Items in bold are new since the last revision of this document.

To locate any published updates for this document, visit our website listed on the back cover of this

document.

Document Number: MPC8379ERMAD

Rev. 1.2, 04/2011

Errata to MPC8379E

PowerQUICC II Pro

Integrated Host Processor

Family Reference Manual, Rev. 1

Section, Page No. Changes

Errata to MPC8379E PowerQUICC II Pro Integrated Host

Processor Family Reference Manual, Rev. 1

2 Freescale Semiconductor

4.3.3.3.1, 4-31 Add the following column on the right of the “1010” column in Table 4-26,

“Examples For Hard-Coded Reset Configuration Words Usage.”

4.4.3, 4-33 Change CFG_CLKIN_DIV

to CFG_CLKIN_DIV.

4.5.1.6, 4-38 Change the first sentence to the following:

“RCR, shown in Figure 4-12, can be used by software to initiate a hard reset

sequence.”

4.5.2, 4-39 Update Output Clock Control Register (OCCR) reset value from “0x0000_FFF8”

to “0x0000_FFFC” in Table 4-34, “Clock Configuration Registers Memory

Map.”

4.5.2.1, 4-40 In Figure 4-14, “System PLL Mode Register” add “SVCOD” at bits 2 and 3. The

updated figure is shown below:

In Table 4-35, “System PLL Mode Register Bit Settings,” modify the row for

bits 2–3 as follows:

Table 4-26. Examples For Hard-Coded Reset Configuration Words Usage

CFG_RESET_SOURCE[0:3] 1000 1001 1010 1011 1101 1110 1111

PCI_CLK (MHz)

66 33 33 50 66 33 66

csb_clk (MHz)

333 133 266 200 266 133 133

Core clock (MHz)

667 533 400 400 533 400 400

DDR Controller clock (data rate)

333 266 266 400 266 266 266

eLBC Controller clock

333 266 266 400 266 266 266

Address 0x0_0A00 Access: Read only

0 1 2 3 4 7 8 9 15 16 31

R LBCM DDRCM SVCOD SPMF CKID COREPLL

—

Reset n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n

See Table 4-35 for reset values.

Figure 4-14 System PLL Mode Register

Table 4-35. System PLL Mode Register Bit Settings

Bits Name Meaning Description

2–3 SVCOD System PLL VCO division Section 4.3.2.1.1, “System PLL VCO Division”

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Freescale Semiconductor 3

4.5.2.3, 4-43 In Table 4-37, “SCCR Bit Descriptions,” replace SCCR[ENCCM] (bits 6–7) field

descriptions with the following:

“Encryption core and I2C1 clock mode.

00 Encryption core clock is disabled.

01 Encryption core clock/csb_clk ratio is 1:1 (for csb_clk < 166 MHz).

10 Encryption core clock/csb_clk ratio is 1:2 (csb_clk has higher frequency

than the encryption core).

11 Encryption core clock/csb_clk ratio is 1:3 (csb_clk has higher frequency

than the encryption core).

The encryption core must have the same clock ratio as the USB unit, unless one

of them has its clock disabled.”

4.5.2.3, 4-43 In Table 4-37, “SCCR Bit Descriptions,” modify the first sentence of the

“Description” column for the “ENCCM” bit as follows:

“Encryption core, JTAG, and I

C1 clock mode.”

The updated row now reads as follows:

5.3.2.5, 5-26 In Table 5-32, “SICRL Bit Settings,” change the SICRL bit settings for bit 16 and

bit 17 to read as follows.

5.3.2.6, 5-28 In the second paragraph, change “A value of 0b11 is illegal for all groups.,” to “A

value of 0b11 selects GPIO mode of the appropriate pin.”

5.3.2.6, 5-29 Change the reset value of bits 5–8 from “0000” to “1111” in Table 5-33, “SICRH

Bit Settings.”

5.3.2.9, 5-33 In Figure 5-21, “DDR Debug Status Register (DDRDSR),” change the access

from “Read” to “Read-only”

5.4.5.2, 5-42 Remove the following sentence from the first bullet list item:

“This is the default value after soft reset.”

Table 4-37. SCCR Bit Descriptions

Bits Name Description

6–7 ENCCM Encryption core, JTAG, and I

C1 clock mode.

00 Encryption core clock is disabled.

01 Encryption core clock/csb_clk ratio is 1:1 (for csb_clk < 166 MHz).

10 Encryption core clock/csb_clk ratio is 1:2 (csb_clk has higher frequency than the encryption core).

11 Encryption core clock/csb_clk ratio is 1:3 (csb_clk has higher frequency than the encryption core).

Note: The encryption core must have the same clock ratio as the USB unit, unless one of them has

its clock disabled.

SICRL[Bits] Value 0b0/0b00 0b1/0b01 0b10 0b11

Bits Group Pin Function 0 Pin Function 1 Pin Function 2 Pin Function 3

16 GPIO1_K GPIO1[10] GTM1_TGATE4

/GTM2_TGATE3 — —

17 GPIO1_J GPIO1[9] GTM1_TIN4/GTM2_TIN3 — —

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5.5.5.5, 5-48 In Table 5-49, “RTEVR Bit Settings,” replace AIF (bit 30) bit field description

with the following:

“Alarm interrupt flag bit.

Used to indicate the alarm interrupt. The bit is set if the RTC issues an interrupt

when the RTC counter value equals RTALR[ALRM].”

5.6.5.5, 5-55 In Table 5-58, “PTEVR Bit Settings,” change bit field description of PTEVR[PIF]

(bit 31) from:

“Periodic interrupt flag bit. Used to indicate the periodic interrupt. It is asserted if

the PIT issues an interrupt after the SPMPIT counter counts to zero. This status bit

should be cleared by software.”

to:

“Periodic interrupt flag bit. It is asserted after the SPMPIT counter counts to zero.

This status bit should be cleared by software.”

5.7.2, 5-58 Change the list bullet items from:

•Maximum period of ~50 msecond (at 333-MHz bus clock and prescaler = 256)

for 16-bit timer

•Maximum period of ~12.8 seconds (at 333-MHz bus clock and prescaler = 256)

for 32-bit timer

to:

•Maximum period of ~206 seconds (at 333-MHz bus clock in slow go mode,

primary and secondary prescaler = 256) for 16-bit timer

•Maximum period of ~3298 seconds (at 333-MHz bus clock and prescaler = 256)

for 32-bit timer

5.7.4, 5-61 In Table 5-60, “GTM External Signals—Detailed Signal Descriptions,” change

the State Meaning description of signal TGATEn, from “In a reset gate mode...”

to “In a restart gate mode...”.

In addition, for the State Meaning description of signal TOUTn, change (list #2)

from:

“TOUTn changes occur on the rising edge of the system clock”

to:

“TOUTn begins or stops counting, depending on the signal state and the

configured mode.”, and for TOUTn signal Timing, change “system clock” to

“timer input clock.”

5.7.6.1, 5-70 In the second paragraph, following the bulleted list, change “65,537” to “65,536.”

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Errata to MPC8379E PowerQUICC II Pro Integrated Host

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Freescale Semiconductor 5

5.7.6.1, 5-70 Change the last sentence in the second paragraph from:

“The maximum period (when the reference value is all ones and the prescaler

divides by 256) for one 16-bit timer is ~50 ms at 333 MHz

to:

“The maximum period (when the reference value is all ones and the prescaler

divides by 256) for one 16-bit timer is ~206 s at 333 MHz.”

5.7.6.3, 5-71 Replace the Note with the following:

NOTE

TGATE

is internally synchronized to the system clock. If TGATE meets the

asynchronous input setup time, the counter begins or stops counting after

one system clock when working with the internal clock.

6.2.5, 6-7 Change the following from:

“Arbiter mask register (AMR) is used to mask interrupts or reset requests. Setting

a mask bit enables the corresponding interrupt or reset request; clearing a bit

masks it. Regular interrupts, MCP interrupts and reset requests can be masked by

AMR register.”

to:

“Arbiter mask register (AMR) is used to mask interrupts. Setting a mask bit

enables the corresponding interrupt; clearing a bit masks it. Regular interrupts and

MCP interrupts can be masked by the AMR register, except for scenarios that

results in a transfer error when the master ID is 0.”

6.2.6, 6-8 Change the access mentioned in Figure 6-6, “Arbiter Event Attributes Register

(AEATR),” from “User Read/ Write” to “User Read-only.”

6.2.7, 6-10 Change the access mentioned in Figure 6-7, “Arbiter Event Address Register

(AEADR),” from “User Read/ Write” to “User Read-only.”

6.3.1.3, 6-14 Change the last sentence in the paragraph from:

“After the completion of snoop copyback, the arbiter grants the bus back to the

master that had its transaction ARTRYed”

to:

“After the completion of snoop copyback, the arbiter grants the bus to the most

ahead master among those masters which have an active bus request signal at that

time, which may or may not be the same master that had its transaction ARTRYed.

Only when a transaction address phase is completed with no ARTRY (and no

repeat conditions), the master moves to the end of the line.”

7.4.1.3.3, 7-22 In Table 7-3, “e300 HID0 Bit Descriptions,” add the following note to EBA (bit 2)

and EBD (bit 3) field descriptions:

“Do not set this bit; the CSB does not have parity signals.”

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6 Freescale Semiconductor

8.5.13, 8-23 In Figure 8-16, “System External Interrupt Mask Register (SEMSR),” change the

following text appearing under the reset values of 0–15 bits from:

“The reset values of implemented bits reflect the values of the external IRQ

signals. Reserved bits are zeros.”

to “All zeros”.

In addition, delete the second footnote that says:

“The user should drive all IRQ inputs to an inactive state prior to reset negation”.

The updated figure is shown below:

Offset 0x38 Access: Read/write

0 1 2 3 4 5 6 7 8 15

IRQ0

IRQ1 IRQ2 IRQ3 IRQ4 IRQ5 IRQ6 IRQ7 —

Reset All zeros

16 17 31

SIRQ0 —

Reset All zeros

This bit is valid only if the IRQ0 signal is configured as an external maskable interrupt (SEMSR[SIRQ0] = 0)

Figure 8-16 System External Interrupt Mask Register (SEMSR)

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Freescale Semiconductor 7

9.3.2.1, 9-6 Change the signal description of MA[14:0] in Table 9-3, “Memory Interface

Signals—Detailed Signal Descriptions” from:

“Assertion/Negation—The address is always driven when the memory controller

is enabled. It is valid when a transaction is driven to DRAM (when MCS

n is

active).”

to:

“Assertion/Negation—The address lines are only driven when the controller has

a command scheduled to issue on the address/CMD bus; otherwise they will be at

high-Z. It is valid when a transaction is driven to DRAM (when MCSn is active).”

9.5, 9-38 Change the second sentence in the third paragraph from:

“Bank sizes up to 2 Gbytes (maximum total physical memory size of 4 Gbytes)

are supported, providing up to a maximum of 4 Gbytes of DDR main memory.”

to:

“Bank sizes up to 2 Gbits (maximum total physical memory size of 4 Gbytes) are

supported, providing up to a maximum of 4 Gbits of DDR main memory per chip

select.”

9.5.12, 9-65 Replace the first sentence of the third paragraph to say the following:

“If a multi-bit error is detected for a read, the DDR memory controller logs the

error and generates the interrupt, and transfer error acknowledge (TEA) is asserted

internally on the CSB bus (if enabled, as described in Section 9.4.1.25, “Memory

Error Disable (ERR_DISABLE)”).”

Chapter 9 Replace Chapter 9, “DDR Memory Controller” with the following updated

chapter:

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Chapter 9

DDR Memory Controller

9.1 Introduction

The fully programmable DDR SDRAM controller supports most JEDEC standard ×8, ×16, ×32, or ×64

DDR2 and DDR memories available. In addition, unbuffered and registered DIMMs are supported.

However, mixing different memory types or unbuffered and registered DIMMs in the same system is not

supported. Built-in error checking and correction (ECC) ensures very low bit-error rates for reliable

high-frequency operation. Dynamic power management and auto-precharge modes simplify memory

system design. A large set of special features, including ECC error injection, support rapid system debug.

NOTE

In this chapter, the word ‘bank’ refers to a physical bank specified by a chip

select; ‘logical bank’ refers to one of the four or eight sub-banks in each

SDRAM chip. A sub-bank is specified by the 2 or 3 bits on the bank address

(MBA) pins during a memory access.

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Figure 9-1 is a high-level block diagram of the DDR memory controller with its

associated interfaces.

Section 9.5, “Functional Description,” contains detailed figures of the controller.

Figure 9-1. DDR Memory Controller Simplified Block Diagram

9.2 Features

The DDR memory controller includes these distinctive features:

• Support for DDR2 and DDR SDRAM

• 64-/72-bit SDRAM data bus, for DDR and DDR2

• Programmable settings for meeting all SDRAM timing parameters

• Support for the following SDRAM configurations:

— As many as four physical banks (chip selects), each bank independently addressable

– 64-Mbit to -Gbit devices depending on internal device configuration with ×8/×16/×32 data

ports (no direct ×4 support)

— Unbuffered and registered DIMMs

• Chip select interleaving support

• Support for data mask signals and read-modify-write for sub-double-word writes. Note that a

read-modify-write sequence is only necessary when ECC is enabled.

Address from

DDR SDRAM

Data from

DDR SDRAM

Data Signals

RMW

ECC

Request from

FIFO

SDRAM

Address

Data Qualifiers

Clocks

To error

MBA[2:0]

MCAS

MRAS

MWE

Decode

Control

Memory Array

Memory Control

master

SDRAM

master

management

CSB

ECC

Delay chain

Error

Signals

SDRAM

Control

Clock

Control

Row

Open

Table

MDIC[0:1]

MA[14:0]

MCKE[0:1]

MDQ[0:63]

MCS[0:3]

MODT[0:3]

MDQS[0:8]

MCK[0:5]

MDM[0:8]

MECC[0:7]

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• Support for double-bit error detection and single-bit error correction ECC (8-bit check word across

or 64-bit data)

• Open page management (dedicated entry for each logical bank)

• Automatic DRAM initialization sequence or software-controlled initialization sequence

• Automatic DRAM data initialization

• Support for up to eight posted refreshes

• Memory controller clock frequency of two times the SDRAM clock with support for sleep power

management

• Support for error injection

9.2.1 Modes of Operation

The DDR memory controller supports the following modes:

• Dynamic power management mode. The DDR memory controller can reduce power consumption

by negating the SDRAM CKE signal when no transactions are pending to the SDRAM.

• Auto-precharge mode. Clearing DDR_SDRAM_INTERVAL[BSTOPRE] causes the memory

controller to issue an auto-precharge command with every read or write transaction.

Auto-precharge mode can be enabled for separate chip selects by setting

CSn_CONFIG[AP_n_EN].

9.3 External Signal Descriptions

This section provides descriptions of the DDR memory controller’s external signals. It describes each

signal’s behavior when the signal is asserted or negated and when the signal is an input or an output.

9.3.1 Signals Overview

Memory controller signals are grouped as follows:

• Memory interface signals

• Clock signals

• Debug signals

Table 9-1 shows how DDR memory controller external signals are grouped. The device

hardware

specification has a pinout diagram showing pin numbers. It also lists all electrical and mechanical

specifications.

Table 9-1. DDR Memory Interface Signal Summary

Name Function/Description Reset Pins I/O

MDQ[0:63] Data bus All zeros 64 I/O

MDQS[0:8] Data strobes All zeros 9 I/O

MECC[0:7] Error checking and correcting All zeros 8 I/O

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Table 9-2 shows the memory address signal mappings.

CAS Column address strobe One 1 O

MA[14:0] Address bus All zeros 15 O

MBA[2:0] Logical bank address All zeros 3 O

MCS[0:3] Chip selects All ones 4 O

MWE Write enable One 1 O

MRAS Row address strobe One 1 O

MDM[0:8] Data mask All zeros 9 O

MCK[0:5] DRAM clock outputs All zeros 6 O

MCK[0:5] DRAM clock outputs (complement) All zeros 6 O

MCKE[0:1] DRAM clock enable All zeros 2 O

MODT[0:3] DRAM on-die termination external control. All zeros 4 O

MDVAL Memory debug data valid Zero 1 O

MSRCID[0:4] Memory debug source ID All zeros 5 O

MDIC[0:1] Driver impedance calibration High Z 2 I/O

Table 9-2. Memory Address Signal Mappings

Signal Name (Outputs) JEDEC DDR DIMM Signals (Inputs)

msb MA14 A14

MA13 A13

MA12 A12

MA11 A11

MA10 A10 (AP for DDR)

MA9 A9

MA8 A8 (alternate AP for DDR)

MA7 A7

MA6 A6

MA5 A5

MA4 A4

MA3 A3

MA2 A2

MA1 A1

lsb MA0 A0

msb MBA2 MBA2

Table 9-1. DDR Memory Interface Signal Summary (continued)

Name Function/Description Reset Pins I/O

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9.3.2 Detailed Signal Descriptions

The following sections describe the DDR SDRAM controller input and output signals, the meaning of their

different states, and relative timing information for assertion and negation.

9.3.2.1 Memory Interface Signals

Table 9-3 describes the DDR controller memory interface signals.

BA1 MBA1

lsb MBA0 MBA0

Auto-precharge for DDR signaled on A10 when DDR_SDRAM_CFG[PCHB8] = 0.

Auto-precharge for DDR signaled on A8 when DDR_SDRAM_CFG[PCHB8] = 1.

Table 9-3. Memory Interface Signals—Detailed Signal Descriptions

Signal I/O Description

MDQ[0:63] I/O Data bus. Both input and output signals on the DDR memory controller.

O As outputs for the bidirectional data bus, these signals operate as described below.

State

Meaning

Asserted/Negated—Represent the value of data being driven by the DDR memory controller.

Timing Assertion/Negation—Driven coincident with corresponding data strobes (MDQS) signal.

High impedance—No READ or WRITE command is in progress; data is not being driven by

the memory controller or the DRAM.

I As inputs for the bidirectional data bus, these signals operate as described below.

State

Meaning

Asserted/Negated—Represents the state of data being driven by the external DDR

SDRAMs.

Timing Assertion/Negation—The DDR SDRAM drives data during a READ transaction.

High impedance—No READ or WRITE command in progress; data is not being driven by the

memory controller or the DRAM.

Table 9-2. Memory Address Signal Mappings (continued)

Signal Name (Outputs) JEDEC DDR DIMM Signals (Inputs)

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MDQS[0:8] I/O Data strobes. Inputs with read data, outputs with write data.

O As outputs, the data strobes are driven by the DDR memory controller during a write transaction. The

memory controller always drives these signals low unless a read has been issued and incoming data

strobes are expected. This keeps the data strobes from floating high when there are no transactions on

the DRAM interface.

State

Meaning

Asserted/Negated—Driven high when positive capture data is transmitted and driven low

when negative capture data is transmitted. Centered in the data “eye” for writes;

coincident with the data eye for reads. Treated as a clock. Data is valid when signals

toggle. See

Table 9-36 for byte lane assignments.

iming Assertion/Negation (for DDR1)—If a WRITE command is registered at clock edge n, data

strobes at the DRAM assert centered in the data eye on clock edge n + 1. See the

JEDEC DDR SDRAM specification for more information.

Assertion/Negation (for DDR2)—If a WRITE command is registered at clock edge n, and the

latency is programmed in TIMING_CFG_2[WR_LAT] to be m clocks, data strobes at the

DRAM assert coincident with the data on clock edge

. See the JEDEC DDR SDRAM

specification for more information.

I As inputs, the data strobes are driven by the external DDR SDRAMs during a read transaction. The data

strobes are used by the memory controller to synchronize data latching.

State

Meaning

Asserted/Negated—Driven high when positive capture data is received and driven low when

negative capture data is received. Centered in the data eye for writes; coincident with

the data eye for reads. Treated as a clock. Data is valid when signals toggle. See

Table 9-36 for byte lane assignments.

Timing Assertion/Negation—If a READ command is registered at clock edge n, and the latency is

programmed in TIMING_CFG_1[CASLAT] to be m clocks, data strobes at the DRAM

assert coincident with the data on clock edge n + m. See the JEDEC DDR SDRAM

specification for more information.

MECC[0:7] I/O Error checking and correcting codes. Input and output signals for the DDR controller’s bidirectional ECC

bus. MECC[0:5] function in both normal and debug modes.

O As normal mode outputs, the ECC signals represent the state of ECC driven by the DDR controller on

writes. As debug mode outputs MECC[0:5] provide source ID and data-valid information. See

Section 9.5.10, “Error Checking and Correcting (ECC),” for more details.

State

Meaning

Asserted/Negated—Represents the state of ECC being driven by the DDR controller on

writes.

Timing Assertion/Negation—Same timing as MDQ

High impedance—Same timing as MDQ

I As inputs, the ECC signals represent the state of ECC driven by the SDRAM devices on reads.

State

Meaning

Asserted/Negated—Represents the state of ECC being driven by the DDR SDRAMs on

reads.

Timing Assertion/Negation—Same timing as MDQ

High impedance—Same timing as MDQ

Table 9-3. Memory Interface Signals—Detailed Signal Descriptions (continued)

Signal I/O Description

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MA[14:0] O Address bus. Memory controller outputs for the address to the DRAM. MA[14:0] carry 15 of the address

bits for the DDR memory interface corresponding to the row and column address bits. MA0 is the lsb of

the address output from the memory controller.

State

Meaning

Asserted/Negated—Represents the address driven by the DDR memory controller. Contains

different portions of the address depending on the memory size and the DRAM

command being issued by the memory controller. See

Table 9-40 Table 9-41 for a

omplete description of the mapping of these signals.

Timing Assertion/Negation—The address lines are only driven when the controller has a command

scheduled to issue on the address/CMD bus; otherwise they will be at high-Z. It is valid

when a transaction is driven to DRAM (when MCSn is active).

High impedance—When the memory controller is disabled

MBA[2:0] O Logical bank address. Outputs that drive the logical (or internal) bank address pins of the SDRAM. Each

SDRAM supports four or eight addressable logical sub-banks. Bit zero of the memory controller’s output

bank address must be connected to bit zero of the SDRAM’s input bank address. MBA0, the

least-significant bit of the three bank address signals, is asserted during the mode register set command

to specify the extended mode register.

State

Meaning

Asserted/Negated—Selects the DDR SDRAM logical (or internal) bank to be activated during

the row address phase and selects the SDRAM internal bank for the read or write

operation during the column address phase of the memory access. Table 9-40

Table 9-41 describes the mapping of these signals in all cases.

Timing Assertion/Negation—Same timing as MAn

High impedance—Same timing as MAn

MCAS O Column address strobe. Active-low SDRAM address multiplexing signal. MCAS is asserted for read or

write transactions and for mode register set, refresh, and precharge commands.

State

Meaning

Asserted—Indicates that a valid SDRAM column address is on the address bus for read and

write transactions. See Table 9-48 for more information on the states required on MCAS

for various other SDRAM commands.

Negated—The column address is not guaranteed to be valid.

Timing Assertion/Negation—Assertion and negation timing is directed by the values described in

Section 9.4.1.4, “DDR SDRAM Timing Configuration 0 (TIMING_CFG_0),”

Section 9.4.1.5, “DDR SDRAM Timing Configuration 1 (TIMING_CFG_1),”

Section 9.4.1.6, “DDR SDRAM Timing Configuration 2 (TIMING_CFG_2),” and

Section 9.4.1.3, “DDR SDRAM Timing Configuration 3 (TIMING_CFG_3).”

High impedance—MCAS is always driven unless the memory controller is disabled.

MRAS O Row address strobe. Active-low SDRAM address multiplexing signal. Asserted for activate commands.

In addition; used for mode register set commands and refresh commands.

State

Meaning

Asserted—Indicates that a valid SDRAM row address is on the address bus for read and

write transactions. See Table 9-48 for more information on the states required on MRAS

for various other SDRAM commands.

Negated—The row address is not guaranteed to be valid.

Timing Assertion/Negation—Assertion and negation timing is directed by the values described in

Section 9.4.1.4, “DDR SDRAM Timing Configuration 0 (TIMING_CFG_0),”

Section 9.4.1.5, “DDR SDRAM Timing Configuration 1 (TIMING_CFG_1),”

Section 9.4.1.6, “DDR SDRAM Timing Configuration 2 (TIMING_CFG_2),” and

Section 9.4.1.3, “DDR SDRAM Timing Configuration 3 (TIMING_CFG_3).”

High impedance—MRAS is always driven unless the memory controller is disabled.

Table 9-3. Memory Interface Signals—Detailed Signal Descriptions (continued)

Signal I/O Description

Section, Page No. Changes

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Freescale Semiconductor 15

MCS

[0:3] O Chip selects. Four chip selects supported by the memory controller.

State

Meaning

Asserted—Selects a physical SDRAM bank to perform a memory operation as described in

Section 9.4.1.1, “Chip Select Memory Bounds (CSn_BNDS),” and Section 9.4.1.2,

“Chip Select Configuration (CSn_CONFIG).” The DDR controller asserts one of the

MCS[0:3] signals to begin a memory cycle.

Negated—Indicates no SDRAM action during the current cycle.

Timing Assertion/Negation—Asserted to signal any new transaction to the SDRAM. The transaction

must adhere to the timing constraints set in TIMING_CFG_0–TIMING_CFG_3.

High impedance—Always driven unless the memory controller is disabled.

MWE O Write enable. Asserted when a write transaction is issued to the SDRAM. This is also used for mode

registers set commands and precharge commands.

State

Meaning

Asserted—Indicates a memory write operation. See Table 9-48 for more information on the

states required on MWE for various other SDRAM commands.

Negated—Indicates a memory read operation.

Timing Assertion/Negation—Similar timing as MRAS and MCAS. Used for write commands.

High impedance—MWE is always driven unless the memory controller is disabled.

MDM[0:8] O DDR SDRAM data output mask. Masks unwanted bytes of data transferred during a write. They are

needed to support sub-burst-size transactions (such as single-byte writes) on SDRAM where all I/O

occurs in multi-byte bursts. MDM0 corresponds to the most significant byte (MSB) and MDM7

corresponds to the LSB, while MDM8 corresponds to the ECC byte. Table 9-36 shows byte lane

encodings.

State

Meaning

Asserted—Prevents writing to DDR SDRAM. Asserted when data is written to DRAM if the

corresponding byte(s) should be masked for the write. Note that the MDMn signals are

active-high for the DDR controller. MDMn is part of the DDR command encoding.

Negated—Allows the corresponding byte to be read from or written to the SDRAM.

Timing Assertion/Negation—Same timing as MDQx as outputs.

High impedance—Always driven unless the memory controller is disabled.

MODT[0:3] O On-Die termination. Memory controller outputs for the ODT to the DRAM. MODT[0:3] represents the

on-die termination for the associated data, data masks, ECC, and data strobes.

State

Meaning

Asserted/Negated—Represents the ODT driven by the DDR memory controller.

Timing Assertion/Negation—Driven in accordance with JEDEC DRAM specifications for on-die

termination timings. It is configured through the CSn_CONFIG[ODT_RD_CFG] and

CSn_CONFIG[ODT_WR_CFG] fields.

High impedance—Always driven.

MDIC[0:1] I/O Driver impedance calibration. Note that the MDIC signals require the use of resistors; MDIC0 must be

pulled to GND, while MDIC1 must be pulled to GV

. See

Section 5.3.2.8, “DDR Control Driver Register

(

DDRCDR),” for more information on these signals.

State

Meaning

These pins are used for automatic calibration of the DDR IOs.

Timing These are driven for four DRAM cycles at a time while the DDR controller is executing the

automatic driver compensation.

Table 9-3. Memory Interface Signals—Detailed Signal Descriptions (continued)

Signal I/O Description

Section, Page No. Changes

Errata to MPC8379E PowerQUICC II Pro Integrated Host

Processor Family Reference Manual, Rev. 1

16 Freescale Semiconductor

9.3.2.2 Clock Interface Signals

Table 9-4 contains the detailed descriptions of the clock signals of the DDR c

ontroller.

9.3.2.3 Debug Signals

The debug signals MSRCID[0:4] and MDVAL have no function in normal DDR controller operation. A

detailed description of these signals can be found in Section 5.3.2.7, “Debug Configuration.”

9.4 Memory Map/Register Definition

Table 9-5 shows the register memory map for the DDR memory controller.

In this table and in the register figures and field descriptions, the following access definitions apply:

• Reserved fields are always ignored for the purposes of determining access type.

• R/W, R, and W (read/write, read only, and write only) indicate that all the non-reserved fields in a

• w1c indicates that all of the non-reserved fields in a register are cleared by writing ones to them.

• Mixed indicates a combination of access types.

• Special is used when no other category applies. In this case the register figure and field description

table should be read carefully.

Table 9-4. Clock Signals—Detailed Signal Descriptions

Signal I/O Description

MCK[0:5],

MCK[0:5]

O DRAM clock outputs and their complements.

State

Meaning

Asserted/Negated—The JEDEC DDR SDRAM specifications require true and complement

clocks. A clock edge is seen by the SDRAM when the true and complement cross.

Timing Assertion/Negation—Timing is controlled by the DDR_CLK_CNTL register at offset 0x130.

MCKE[0:1] O Clock enable. Output signals used as the clock enables to the SDRAM. MCKE[0:1] can be negated to stop

clocking the DDR SDRAM. The MCKE signals should be connected to the same rank of memory as the

corresponding MCS and MODT signals. For example, MCKE[0] should be connected to the same rank of

memory as MCS[0] and MODT[0].

State

Meaning

Asserted—Clocking to the SDRAM is enabled.

Negated—Clocking to the SDRAM is disabled and the SDRAM should ignore signal transitions

on MCK or MCK. MCK/MCK are don’t cares while MCKE[0:1] are negated.

Timing Assertion/Negation—Asserted when DDR_SDRAM_CFG[MEM_EN] is set. Can be negated

when entering dynamic power management or self refresh. Are asserted again when

exiting dynamic power management or self refresh.

High impedance—Always driven.

Table 9-5. DDR Memory Controller Memory Map

Offset Register Access Reset Section/Page

DDR Memory Controller—Block Base Address 0x0_2000

0x000 CS0_BNDS—Chip select 0 memory bounds R/W All zeros 9.4.1.1/9-18

0x008 CS1_BNDS—Chip select 1 memory bounds R/W All zeros 9.4.1.1/9-18

Section, Page No. Changes

Errata to MPC8379E PowerQUICC II Pro Integrated Host

Processor Family Reference Manual, Rev. 1

Freescale Semiconductor 17

0x010 CS2_BNDS—Chip select 2 memory bounds R/W All zeros 9.4.1.1/9-18

0x018 CS3_BNDS—Chip select 3 memory bounds R/W All zer

os 9.4.1.1/9-18

0x080 CS0_CONFIG—Chip select 0 configuration R/W All zeros 9.4.1.2/9-18

0x084 CS1_CONFIG—Chip select 1 configuration R/W All zeros 9.4.1.2/9-18

0x088 CS2_CONFIG—Chip select 2 configuration R/W All zeros 9.4.1.2/9-18

0x08C CS3_CONFIG—Chip select 3 configuration R/W All zeros 9.4.1.2/9-18

0x100 TIMING_CFG_3—DDR SDRAM timing configuration 3 R/W All zeros 9.4.1.3/9-20

0x104 TIMING_CFG_0—DDR SDRAM timing configuration 0 R/W 0x0011_0105 9.4.1.4/9-21

0x108 TIMING_CFG_1—DDR SDRAM timing configuration 1 R/W All zeros 9.4.1.5/9-22

0x10C TIMING_CFG_2—DDR SDRAM timing configuration 2 R/W All zeros 9.4.1.6/9-24

0x110 DDR_SDRAM_CFG—DDR SDRAM control configuration R/W 0x0200_0000 9.4.1.7/9-26

0x114 DDR_SDRAM_CFG_2—DDR SDRAM control configuration 2 R/W All zeros 9.4.1.8/9-29

0x118 DDR_SDRAM_MODE—DDR SDRAM mode configuration R/W All zeros 9.4.1.9/9-31

0x11C DDR_SDRAM_MODE_2—DDR SDRAM mode configuration 2 R/W All zeros 9.4.1.10/9-32

0x120 DDR_SDRAM_MD_CNTL—DDR SDRAM mode control R/W All zeros 9.4.1.11/9-32

0x124 DDR_SDRAM_INTERVAL—DDR SDRAM interval configuration R/W All zeros 9.4.1.12/9-35

0x128 DDR_DATA_INIT—DDR SDRAM data initialization R/W All zeros 9.4.1.13/9-35

0x130 DDR_SDRAM_CLK_CNTL—DDR SDRAM clock control R/W 0x0200_0000 9.4.1.14/9-36

0x140–

0x144

Reserved — — —

0x148 DDR_INIT_ADDR—DDR training initialization address R/W All zeros 9.4.1.15/9-36

0x150–

0xBF4

Reserved — — —

0xBF8 DDR_IP_REV1—DDR IP block revision 1 R 0xnnnn_nnnn

9.4.1.16/9-37

0xBFC DDR_IP_REV2—DDR IP block revision 2 R 0x00nn_00nn

9.4.1.17/9-37

0xE00 DATA_ERR_INJECT_HI—Memory data path error injection mask high R/W All zeros 9.4.1.18/9-38

0xE04 DATA_ERR_INJECT_LO—Memory data path error injection mask low R/W All zeros 9.4.1.19/9-38

0xE08 ERR_INJECT—Memory data path error injection mask ECC R/W All zeros 9.4.1.20/9-39

0xE20 CAPTURE_DATA_HI—Memory data path read capture high R/W All zeros 9.4.1.21/9-39

0xE24 CAPTURE_DATA_LO—Memory data path read capture low R/W All zeros 9.4.1.22/9-40

0xE28 CAPTURE_ECC—Memory data path read capture ECC R/W All zeros 9.4.1.23/9-40

0xE40 ERR_DETECT—Memory error detect w1c All zeros 9.4.1.24/9-40

0xE44 ERR_DISABLE—Memory error disable R/W All zeros 9.4.1.25/9-41

0xE48 ERR_INT_EN—Memory error interrupt enable R/W All zeros 9.4.1.26/9-42

0xE4C CAPTURE_ATTRIBUTES—Memory error attributes capture R/W All zeros 9.4.1.27/9-43

0xE50 CAPTURE_ADDRESS—Memory error address capture R/W All zeros 9.4.1.28/9-44

0xE58 ERR_SBE—Single-Bit ECC memory error management R/W All zeros 9.4.1.29/9-44

Implementation-dependent reset values are listed in specified section/page.

Table 9-5. DDR Memory Controller Memory Map (continued)

Offset Register Access Reset Section/Page

Section, Page No. Changes

Errata to MPC8379E PowerQUICC II Pro Integrated Host

Processor Family Reference Manual, Rev. 1

18 Freescale Semiconductor

9.4.1 Register Descriptions

This section describes the DDR memory controller registers. Shading indicates reserved fields that should

not be written.

9.4.1.1 Chip Select Memory Bounds (CSn_BNDS)

The chip select bounds registers (CSn_BNDS) define the starting and ending address of the memory space

that corresponds to the individual chip selects. Note that the size specified in CSn_BNDS should equal the

size of physical DRAM. Also, note that EAn must be greater than or equal to SAn.

If chip select interleaving is enabled, all fields in the lower interleaved chip select are used, and the other

chip selects’ bounds registers are unused. For example, if chip selects 0 and 1 are interleaved, all fields in

CS0_BNDS are used, and all fields in CS1_BNDS are unused.

CSn_BNDS are shown in Figure 9-2.

Table 9-6 describes the CSn_B

NDS register fields.

9.4.1.2 Chip Select Configuration (CSn_CONFIG)

The chip select configuration (CSn_CONFIG) registers shown in Figure 9-3 enable the DDR chip selects

and set the number of row and column bits used for each chip select. These registers should be loaded with

the correct number of row and column bits for each SDRAM. Because CSn_CONFIG[ROW_BITS_CS_n,

COL_BITS_CS_n] establish address multiplexing, the user should take great care to set these values

correctly.

If chip select interleaving is enabled, then all fields in the lower interleaved chip select are used, and the

other registers’ fields are unused, with the exception of the ODT_RD_CFG and ODT_WR_CFG fields.

For example, if chip selects 0 and 1 are interleaved, all fields in CS0_CONFIG are used, but only the

ODT_RD_CFG and ODT_WR_CFG fields in CS1_CONFIG are used.

Offset 0x000, 0x008, 0x010, 0x018 Access: Read/Write

0 7 8 15 16 23 24 31

— SAn — EAn

Reset All zeros

Figure 9-2. Chip Select Bounds Registers (CSn_BNDS)

Table 9-6. CSn_BNDS Field Descriptions

Bits Name Description

0–7 — Reserved

8–15 SAn Starting address for chip select (bank) n. This value is compared against the 8 msbs of the 32-bit address.

16–23 — Reserved

24–31 EAn Ending address for chip select (bank) n. This value is compared against the 8 msbs of the 32-bit address.

Section, Page No. Changes

Errata to MPC8379E PowerQUICC II Pro Integrated Host

Processor Family Reference Manual, Rev. 1

Freescale Semiconductor 19

Table 9-7 describes the CSn_C

ONFIG register fields.

Offset 0x080, 0x084, 0x088, 0x08C Access: Read/Write

0 1 7 8 9 11 12 13 15

CS_n _EN — AP_n_EN ODT_RD_CFG — ODT_WR_CFG

Reset All zeros

16 17 18 20 21 23 24 28 29 31

BA_BITS_CS_n —

ROW_BITS_

CS_n

— COL_BITS_CS_n

Reset All zeros

Figure 9-3. Chip Select Configuration Register (CSn_CONFIG)

Table 9-7. CSn_CONFIG Field Descriptions

Bits Name Description

0 CS_n_EN Chip select n enable

0 Chip select n is not active

1 Chip select n is active and assumes the state set in CSn_BNDS.

1–7 — Reserved

8 AP_n_EN Chip select n auto-precharge enable

0 Chip select n is only auto-precharged if global auto-precharge mode is enabled

(DDR_SDRAM_INTERVAL[BSTOPRE] = 0).

1 Chip select n always issues an auto-precharge for read and write transactions.

9–11 ODT_RD_CFG ODT for reads configuration. Note that CAS latency plus additive latency must be at least

3 cycles for ODT_RD_CFG to be enabled. ODT should only be used with DDR2 memories.

000 Never assert ODT for reads

001 Assert ODT only during reads to CSn

010 Assert ODT only during reads to other chip selects

011 Assert ODT only during reads to other DIMM modules. It is assumed that CS0 and CS1 are

on the same DIMM module, whereas CS2 and CS3 are on a separate DIMM module.

100 Assert ODT for all reads

101–111Reserved

12 — Reserved

13–15 ODT_WR_CFG ODT for writes configuration. Note that write latency plus additive latency must be at least

3 cycles for ODT _WR_CFG to be enabled. ODT should only be used with DDR2 memories.

000 Never assert ODT for writes

001 Assert ODT only during writes to CSn

010 Assert ODT only during writes to other chip selects

011 Assert ODT only during writes to other DIMM modules. It is assumed that CS0 and CS1

are on the same DIMM module, whereas CS2 and CS3 are on a separate DIMM module.

100 Assert ODT for all writes

101–111Reserved

16–17 BA_BITS_CS_n Number of bank bits for SDRAM on chip select n. These bits correspond to the sub-bank bits

driven on MBAn in

Table 9-43.

0 2 logical bank bits

01 3 logical bank bits

10–11Reserved

Section, Page No. Changes

Errata to MPC8379E PowerQUICC II Pro Integrated Host

Processor Family Reference Manual, Rev. 1

20 Freescale Semiconductor

9.4.1.3 DDR SDRAM Timing Configuration 3 (TIMING_CFG_3)

DDR SDRAM timing configuration register 3, shown in Figure 9-4, sets the extended refresh recovery

ime, which is combined with TIMING_CFG_1[REFREC] to determine the full refresh recovery time.

Table 9-8 describes TIMING_CFG_3 fields.

18–20 — Reserved

21–23 ROW_BITS_CS_n Number of row bits for SDRAM on chip select n. See Table 9-43 for details.

000 12 row bits

001 13 row bits

010 14 row bits

011 15 row bits

000–111 Reserved

24–28 — Reserved

29–31 COL_BITS_CS_n Number of column bits for SDRAM on chip select n. For DDR, the decoding is as follows:

000 8 column bits

001 9 column bits

010 10 column bits

011 11 column bits

100–111 Reserved

Offset 0x100 Access: Read/Write

0 12 13 15 16 31

— EXT_REFREC —

Reset All zeros

Figure 9-4. DDR SDRAM Timing Configuration 3 (TIMING_CFG_3)

Table 9-8. TIMING_CFG_3 Field Descriptions

Bits Name Description

0–12 — Reserved

13–15 EXT_REFREC Extended refresh recovery time (t

RFC

). Controls the number of clock cycles from a refresh command

until an activate command is allowed. This field is concatenated with TIMING_CFG_1[REFREC] to

obtain a 7-bit value for the total refresh recovery. Note that hardware adds an additional 8 clock

cycles to the final, 7-bit value of the refresh recovery. t

RFC

= {EXT_REFREC || REFREC} + 8, such

that t

RFC

is calculated as follows:

000 0 clocks

001 16 clocks

010 32 clocks

011 48 clocks

100 64 clocks

101 80 clocks

110 96 clocks

111 112 clocks

16–31 — Reserved

Table 9-7. CSn_CONFIG Field Descriptions (continued)

Bits Name Description

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